Valve



Feb. 14, 1928. 1,659,388

W. H. BRISTOL VALVE Filed March 2, 1925 ATTORNEY llti Patented Feb. 14, 1928.

UNITED STATES insane WELLIAM -I. BRISTOL, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE BRISTOL COMPANY, OF WATER-BURY, CONNECTICUT, A

CORPORATON F CONNECTICUT.

VALVE.

The invention relates to an automatic air valve for venting air or other non-condensible gases, particularly such Aas are likely to develop in Connection with the operation oi systems utilizing steam and wherein it becomes desirable and generally necessary to remove, preferably automatically, the accumulation ot said non-condensible gases which have a tendency to collect in some remote portion oft the system. rlhepnovel valve device is more especially suitable 'tor use in systems wherein the steam utilized is lilrely to be at high pressures. Under such conditions, the ordinary type of air valve becomes useless, especially in view of the resulting high temperatures to which the valve mechanism is exposed.

lt is the object ot the present invention to provide a novel valve suitable tor operation under these extreme conditions of tem perature and pressure and which shall be rugged and simple in construction without sacrificing eltectiveness in the removal ot the gases. A. 'further object ot the invention consists in a positively acting valve with seit-cleaning orF the valve seat and in which provision is made tor alording visual indication ot the state of operation, said means. at the saine time enabling also the valve to Ice manually or otherwise operated externally to effect discharge ot gas.

The nature or' the invention, however, will best be under-stood when described in conneet-ion with the accompanying drawings, in which Fig. 1 is a 'trent elevation of the valve, with'a portion of the casing broken away to disclose the interior.

Fig. 2 is a side elevation thereof.

Fig. 3 is a fragmentary detail longitudinal section; and Fig. el is a vertical sec tion, taken on theline 4-fl, Fig. 3.

Referring to the drawings, the valve is shown to consist of a body affording a suitable chamber for receiving the gases to be vented and provided with a horizontally disposed inlet ll tor outside connection in the usual manner. The body 10 is preterably ot the T type, having an opening 12 disposed at right angles to the axis or the inlet opening 11, which opening. for convenience in assembly has removably secured thereto an extension piece 13 adapted to be closed by a plug 14. The latter has soldered or otherwise secured thereto the actuating member for the valve` the same being shown as a thermostatic device such as a loi-metallic strip 15. As .is well understood, such strip will be affected by difterences of temperature to provide a slight movement substantially at right angles to its length, that is to say, thefstrip is to be so located that its itree end will move substantially in the axis ot the inlet 1l. The tree end thereof has, furthermore, secured thereto a valve stem mounted substantially co-axially with the horizontal axis ot the valve body or inlet 11 thereof, suitable adj ust-ing threaded portion ot the stem and located upon opposite sides of the end ot the member 15 to insure the proper location ol the stem axially.

The latter is provided intermediate its ends also with an enlargement, as a spherical portion or ball 22; and the said ball 22 is designed to lit a valve seat or cavity 23 provided in the inner Jface ot the plug 24. The latter is designed to close an opening 25 which is disposed in the valve body opposite the inlet opening 11 and coaxial with respect thereto. The said plug, moreover` is bored axially thru to receive an extensionfQG ot the valve stem. which extension is designed to tit thru the bore ot the plug with a slight clearance provided therebetween. Axial movement of the valve stem, due to the influence ot temperature variations upon the strip, will thus cause the ball 22 to seat or unseat itself in the said seat 23 to seal or open respectively the outlet thru the plug 24. At the saine time, such reciprocatory movement imparted to the extension 26 will serve to keep the valve seat clean and the opening` clear at all times-insuring the venting of the gases from the valve, and which will occur until steam reaches the bimetallic strip 15 to cause same thereby to close again the valve at its seat 23.

ln the provision ot the extension piece 26, furthermore, a ready means is alorded for indicating, by the amount projecting, whether the valve is sealed or open; and. external control of the valve is also aEorded thereby as by pressing thereon, so that the valve may at anv time be caused to open. rlhe construction set forth is extremely simple and rugged, and the valve is positively nuts 21 being fitted over the4 acting and not subject to damage by the comparatively high temperatures and pressures prevailing.

I claim l. An automatic valve7 comprising a body affording a chamber provided With an inlet and an outlet to the atmosphere, an exten nally accessible plug closing said outlet and having an axial bore therethrough affording communication between the interior of the casing and the atmosphere and providing a bearing terminating at its inner end in a valve seat, a therinostatically controlled actuating member carried by said valve body, and a valve stem movable by said actuating' member and having a valve member thereon adapted to tit the valve seat to seal the valve and an extension fitting the bearing and operating to maintain the same clean as it reeiprocates therethrough.

2. An automatic valve, comprising a body affording a chamber provided with an inlet and an outlet to the atmosphere, an externally accessible plug closingI eaid outlet and having an axial bore therethrol'lgh affording communication between the interior et the lasing and the atmosphere and providing a bearing terminating` at its inner end in a valve seat, a thermostatically controlled actuatingr member arried by said valve body. and a valve stem n'ifivable by said actuating member and having a valve member thereon adapted to tit the valve seat te seal the valve and an entenaion fitting the bearing and operating to maintain the saine clean as it reeiproeates therethrough, said extension project-ing beyond the outer end oi' said valve plug to atterri a visual indication of' the position of the valve as Well as to allow ot manual operation et the valve to unseat the same for effecting discharge of the gaseous contenta oi the easing.

Signed at New York. in the county of New York and State ot New York, this lilith day of February A. 1025.

lNlLLIAli/l H. BRISTOL. 

